Sample size calculations in clinical research / Shein-Chung Chow ... [et al.]. Chow, Shein-Chung. aut. Clinical medicine - Research. Drug testing. Drug development. 615.50724 SAM Includes index. Bibliography: p. 465-480. Boca Raton : CRC Press, 2018. 2018. 2018 Text xviii, 492 p. : eng Chapman & Hall/CRC biostatistics series