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Brazier JE, Walters SJ, Nicholl JP, Kohler B.Brazier JE, et al. Among authors: walters sj.Qual Life Res. 1996 Apr;5(2):195-204. doi: 10.1007/BF00434741.Qual Life Res. 1996.PMID: 8998488Clinical Trial.
O'Cathain A, Walters SJ, Nicholl JP, Thomas KJ, Kirkham M.O'Cathain A, et al. Among authors: walters sj.BMJ. 2002 Mar 16;324(7338):643. doi: 10.1136/bmj.324.7338.643.BMJ. 2002.PMID: 11895822Free PMC article.Clinical Trial.
O'Cathain A, Thomas K, Walters SJ, Nicholl J, Kirkham M.O'Cathain A, et al. Among authors: walters sj.Midwifery. 2002 Jun;18(2):136-44. doi: 10.1054/midw.2002.0301.Midwifery. 2002.PMID: 12139911
O'cathain A, Nicholl J, Sampson F, Walters S, McDonnell A, Munro J.O'cathain A, et al.J Health Serv Res Policy. 2004 Oct;9(4):226-33. doi: 10.1258/1355819042250221.J Health Serv Res Policy. 2004.PMID: 15509408