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2. Erythema dyschromicum perstans a hitherto undescribed skin disease;Convit;J Invest Dermatol,1961
3. Lichen planus pigmentosus;Bhutani;Dermatologica,1974
4. Pigmented cosmetic dermatitis;Nakayama;Int J Dermatol,1976
5. Ashy dermatosis or lichen planus pigmentosus: what is in a name.Arch Dermatol?;Bhutani,1986