Effects of 13-cis-retinoic acid, all-trans-retinoic acid and acitretin on the proliferation, lipid synthesis and keratin expression of cultured human sebocytes in vitro. - Zouboulis,CC.; Korge,B.; Akamatsu,H.; Xia,L.; Schiller,S.; Gollnick,H.; Orfanos,CE. (J Invest Dermatol, 1991)