1. Cotsarelis G, Botchkarev V. Disorders of the hair and nails. In: Wolff K, Goldsmith LA, Katz SI, Gilchrest BA, Paller AS, Leffell DJ, editor. Fitzpatrick's dermatology in general medicine. 7th ed. New York: McGraw-Hill; 2008. p. 739–749.
2. Cotsarelis G, Millar SE, Chan EF. Embryology and anatomy of the hair follicle. In: Olsen EA, editor. Disorders of hair growth: diagnosis and treatment. 2nd ed. New York: McGraw-Hill; 2003. p. 15.
3. Shapiro J. Hair loss: principles of diagnosis and management of alopecia. London: Martin Dunitz; 2002.
4. Wolfram LJ, Dika E, Maibach HI. Hair anthropology. In: Berardesca E, Leveque JL, Maibach HI, editor. Ethnic skin and hair. New York: Informa Healthcare; 2006. p. 55–67.
5. Tajima M, Hamada C, Arai T, Miyazawa M, Shibata R, Ishino A. Characteristic features of Japanese women's hair with aging and with progressing hair loss. J Dermatol Sci 2007;45:93–103.
6. Birch MP, Messenger JF, Messenger AG. Hair density, hair diameter and the prevalence of female pattern hair loss. Br J Dermatol 2001;144:297–304.
7. Yoo JH, Park HY, Park TH, Kim KJ. Quantitative analysis on the scalp hair characteristics in Koreans using phototrichogram. Korean J Dermatol 2002;40:1035–1043.
8. Kang H, Kang TW, Lee SD, Park YM, Kim HO, Kim SY. The changing patterns of hair density and thickness in South Korean women with hair loss: clinical office-based phototri-chogram analysis. Int J Dermatol 2009;48:14–21.
9. Stenn KS, Paus R. Controls of hair follicle cycling. Physiol Rev 2001;81:449–494.
10. Paus R, Muller-Rover S, Botchkarev VA. Chronobiology of the hair follicle: hunting the "hair cycle clock". J Investig Dermatol Symp Proc 1999;4:338–345.
11. Rushton H, James KC, Mortimer CH. The unit area trichogram in the assessment of androgen-dependent alopecia. Br J Dermatol 1983;109:429–437.
12. Park YT, Yoo JH, Park TH, Kim KJ. Comparative evaluation of hair density and grouped hair unit pattern between androge-netic alopecia and normal scalp. Ann Dermatol 2004;16:1–8.
13. Haw S, Lew BL, Sim WY. The study of density and thickness of Koreans' scalp hair with aging. Korean J Dermatol 2008;46:Suppl 2. 161.
14. Park J, Ihm CW. Evaluation of the scalp hair mass of Koreans. Korean J Dermatol 2010;48:17–25.
15. Zouboulis CC, Chen WC, Thornton MJ, Qin K, Rosenfield R. Sexual hormones in human skin. Horm Metab Res 2007;39:85–95.
16. Shah D, Patel S. Hirsutism. Gynecol Endocrinol 2009;25:140–148.
17. Alonso LC, Rosenfield RL. Molecular genetic and endocrine mechanisms of hair growth. Horm Res 2003;60:1–13.
18. Whiting DA. Possible mechanisms of miniaturization during androgenetic alopecia or pattern hair loss. J Am Acad Dermatol 2001;45:S81–S86.
20. Randall VA. Androgens and hair growth. Dermatol Ther 2008;21:314–328.
21. Goldberg LJ, Lenzy Y. Nutrition and hair. Clin Dermatol 2010;28:412–419.
22. Olsen EA. Iron deficiency and hair loss: the jury is still out. J Am Acad Dermatol 2006;54:903–906.
25. Tosi A, Misciali C, Piraccini BM, Peluso AM, Bardazzi F. Drug-induced hair loss and hair growth: incidence, management and avoidance. Drug Saf 1994;10:310–317.
26. Tosti A, Pazzaglia M. Drug reactions affecting hair: diagnosis. Dermatol Clin 2007;25:223–231.
27. Hamilton JB. Male hormone stimulation is prerequisite and an incitant in common baldness. Am J Anat 1942;71:451–480.
29. Lee WS, Oh Y, Ji JH, Park JK, Kim do W, Sim WY, Kim HO, Hwang SW, Yoon TY, Kye YC, Choi GS, Kim MB, Huh CH, Ro BI, Kim SJ, Kim JH, Lee Y. Analysis of familial factors using the basic and specific (BASP) classification in Korean patients with androgenetic alopecia. J Am Acad Dermatol 2011;65:40–47.
30. Hillmer AM, Flaquer A, Hanneken S, Eigelshoven S, Kortum AK, Brockschmidt FF, Golla A, Metzen C, Thiele H, Kolberg S, Reinartz R, Betz RC, Ruzicka T, Hennies HC, Kruse R, Nothen MM. Genome-wide scan and fine-mapping linkage study of androgenetic alopecia reveals a locus on chromosome 3q26. Am J Hum Genet 2008;82:737–743.
31. Inui S, Itami S. Molecular basis of androgenetic alopecia: from androgen to paracrine mediators through dermal papilla. J Dermatol Sci 2011;61:1–6.
32. Lee WS, Ro BI, Hong SP, Bak H, Sim WY, Kim do W, Park JK, Ihm CW, Eun HC, Kwon OS, Choi GS, Kye YC, Yoon TY, Kim SJ, Kim HO, Kang H, Goo J, Ahn SY, Kim M, Jeon SY, Oh TH. A new classification of pattern hair loss that is universal for men and women: basic and specific (BASP) classification. J Am Acad Dermatol 2007;57:37–46.
33. Olsen EA, Dunlap FE, Funicella T, Koperski JA, Swinehart JM, Tschen EH, Trancik RJ. A randomized clinical trial of 5% topical minoxidil versus 2% topical minoxidil and placebo in the treatment of androgenetic alopecia in men. J Am Acad Dermatol 2002;47:377–385.
34. Park HY, Lee WS, Park J, Kim DW, Ahn SY, Jung YJ, Ro BI, Sim WY, Park SW, Choi GS, Kim HO, Huh CH, Yoon TY, Kim MB, Kim KH, Song H, Yun SJ. An open label, multi-center clinical trial of topical 5% minoxidil solution for the treatment of male androgenetic alopecia (a phase IV study). Korean J Dermatol 2009;47:295–302.
35. Kaufman KD, Olsen EA, Whiting D, Savin R, DeVillez R, Bergfeld W, Price VH, Van Neste D, Roberts JL, Hordinsky M, Shapiro J, Binkowitz B, Gormley GJ. Finasteride Male Pattern Hair Loss Study Group. Finasteride in the treatment of men with androgenetic alopecia. J Am Acad Dermatol 1998;39((4 Pt 1):578–589.
36. Finasteride Male Pattern Hair Loss Study Group. Long-term (5-year) multinational experience with finasteride 1 mg in the treatment of men with androgenetic alopecia. Eur J Dermatol 2002;12:38–49.
37. Kaufman KD, Rotonda J, Shah AK, Meehan AG. Long-term treatment with finasteride 1 mg decreases the likelihood of developing further visible hair loss in men with androgenetic alopecia (male pattern hair loss). Eur J Dermatol 2008;18:400–406.
38. Olsen EA, Hordinsky M, Whiting D, Stough D, Hobbs S, Ellis ML, Wilson T, Rittmaster RS. Dutasteride Alopecia Research Team. The importance of dual 5alpha-reductase inhibition in the treatment of male pattern hair loss: results of a random-ized placebo-controlled study of dutasteride versus finaste-ride. J Am Acad Dermatol 2006;55:1014–1023.
39. Eun HC, Kwon OS, Yeon JH, Shin HS, Kim BY, Ro BI, Cho HK, Sim WY, Lew BL, Lee WS, Park HY, Hong SP, Ji JH. Efficacy, safety, and tolerability of dutasteride 0.5 mg once daily in male patients with male pattern hair loss: a randomized, double-blind, placebo-controlled, phase III study. J Am Acad Dermatol 2010;63:252–258.
40. Olsen EA. Female pattern hair loss. J Am Acad Dermatol 2001;45:3 Suppl. S70–S80.