TY - RPRT TI - Nested consent design for clinical trials. AU - N Hamajima AU - H Yuasa AU - M Nakamura AU - K Tajima AU - S Tominaga PY - 1998 DO - 10.1093/jjco/28.5.329 UR - https://pubmed.ncbi.nlm.nih.gov/9703861/ ID - 9703861 ER -