Response to Professor Olsen’s Commentary on? Random Sampling? Is It Worth It??

Elliott, Michael R; Bracken, Michael B; Hertz-Picciotto, Irva; Dudley, Donald J; Buka, Stephen; Robbins, James M; Paneth, Nigel. (2013). Response to Professor Olsen's Commentary on? Random Sampling? Is It Worth It??. Paediatric and perinatal epidemiology. 27(1), 29-30.