TY - GEN AU - Leyden,J J TI - Tretinoin therapy in photoageing: historical perspective SN - 0007-0963 PY - 1990///0621 KW - Administration, Topical KW - Animals KW - Cell Differentiation KW - drug effects KW - Humans KW - Mice KW - Randomized Controlled Trials as Topic KW - Skin KW - cytology KW - Skin Aging KW - Tretinoin KW - administration & dosage N1 - Publication Type: Clinical Trial; Journal Article; Review UR - https://doi.org/10.1111/j.1365-2133.1990.tb16130.x ER -