TY - RPRT TI - Intrasubject variation in sustained-release theophylline absorption. AU - R A Dederich AU - S J Szefler AU - E R Green PY - 1981 DO - 10.1016/0091-6749(81)90100-7 UR - https://pubmed.ncbi.nlm.nih.gov/7346530/ ID - 7346530 ER -