TY - RPRT TI - 17 beta-estradiol/levonorgestrel transdermal system. AU - Toni M Dando AU - Caroline M Perry PY - 2004 DO - 10.2165/00024677-200403050-00005 UR - https://pubmed.ncbi.nlm.nih.gov/15330679/ ID - 15330679 ER -