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Farningham DA, Mercer JG, Lawrence CB.Farningham DA, et al. Among authors: mercer jg.Physiol Behav. 1993 Sep;54(3):437-42. doi: 10.1016/0031-9384(93)90232-5.Physiol Behav. 1993.PMID: 8415934
Mercer JG, Lawrence CB, Atkinson T.Mercer JG, et al.Brain Res Mol Brain Res. 1996 Dec 31;43(1-2):202-8. doi: 10.1016/s0169-328x(96)00174-x.Brain Res Mol Brain Res. 1996.PMID: 9037534