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Rennick JE, Johnston CC, Dougherty G, Platt R, Ritchie JA.Rennick JE, et al. Among authors: ritchie ja.J Dev Behav Pediatr. 2002 Jun;23(3):133-44. doi: 10.1097/00004703-200206000-00002.J Dev Behav Pediatr. 2002.PMID: 12055495
Rochefort CM, Ward L, Ritchie JA, Girard N, Tamblyn RM.Rochefort CM, et al. Among authors: ritchie ja.Nurs Res. 2011 Jul-Aug;60(4):221-30. doi: 10.1097/NNR.0b013e318221b6ce.Nurs Res. 2011.PMID: 21691242