[1] Beers M and Berkow R.  The Merck Manual 17^th Ed.  Pp: 835-836.

[2] Beers M and Berkow R.  The Merck Manual 17^th Ed.  Pp: 835-836.

[3] Fitzpatrick T et al.  Color atlas and synopsis of clinical dermatology.  3^rd Ed.  McGraw-Hill New York.  Pp: 287-295.

[4] www.niams.com  National Institute of Arthritic Musculoskeletal and Skin Diseases.  Oct 2004.

[5] www.niams.com  National Institute of Arthritic Musculoskeletal and Skin Diseases.  Oct 2004.

[6] Fitzpatrick T et al.  Color atlas and synopsis of clinical dermatology.  3^rd Ed.  McGraw-Hill New York.  Pp: 287-295.

[7] Fitzpatrick T et al.  Color atlas and synopsis of clinical dermatology.  3^rd Ed.  McGraw-Hill New York.  Pp: 287-295.

[8] Fitzpatrick T et al.  Color atlas and synopsis of clinical dermatology.  3^rd Ed.  McGraw-Hill New York.  Pp: 287-295.

[9] Juhlin L and Olsson MJ.  Improvement of vitiligo after oral treatment with Vitamin B12 and folic acid and the importance of sun exposure.  Acta Derm Venereol.  1997 Nov; 77(6): 460-462.

[10] Montes LF et al.  Folic acid and vitamin B12 in vitiligo: a nutritional approach.  Cutis. 1992 Jul; 50(1): 39-42.

[11] Maresca V et al.  Increased sensitivity to peroxidative agents as a possible pathogenic factor of melanocyte damage in vitiligo.  J Invest Dermatol.  1997 Sep; 109(3): 310-313.

[12] Passi S et al.  Epidermal oxidative stress in vitiligo.  Pigment Cell Res.  1998 Apr; 11(2): 81-85.

[13] Katayama I et al.  Open trial of topical tacalcitol [1 alpha 24(OH)2D3] and solar irradiation for vitiligo vulgaris: upregulation of c-Kit mRNA by cultured melanocytes.  Eur J Dermatol.  2003 Jul-Aug; 13(4): 372-376.

[14] Ameen M, Exarchou V, and Chu AC.  Topical calcipotriol as monotherapy and in combination with psoralen plus ultraviolet A in treatment of vitiligo.  Br J Dermatol.  2001 Sep; 145(3): 476-479.

[15] Camacho F and Mazuecos J.  Oral and topical L-phenylalanine, clobetasol propionate and UVA/sunlight- a new study for the treatment of vitiligo.  J Drugs Dermatol.  2002 Sep; 1(2): 127-131.

[16] Arch Dermatol. 1999; 135: 216-217.

[17] Antoniou C et al.  Vitiligo therapy with oral and topical phenylalanine with UVA exposure.  Int J Dermatol.  1989 Oct; 28(8): 545-547.

[18] Parsad D, Pandhi R, and Juneja A.  Effectiveness of oral ginkgo biloba in treating mild slowly spreading vitiligo.  Clin Exp Dermatol.  2003 May; 28(3): 285-287.