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Cotton MF, Donald PR, Schoeman JF, Aalbers C, Van Zyl LE, Lombard C.Cotton MF, et al. Among authors: donald pr.Pediatr Infect Dis J. 1991 Nov;10(11):837-42. doi: 10.1097/00006454-199111000-00009.Pediatr Infect Dis J. 1991.PMID: 1844394
Seifart HI, Parkin DP, Donald PR.Seifart HI, et al. Among authors: donald pr.Pediatr Infect Dis J. 1991 Nov;10(11):827-31. doi: 10.1097/00006454-199111000-00007.Pediatr Infect Dis J. 1991.PMID: 1749695
Cotton MF, Donald PR, Aalbers C.Cotton MF, et al. Among authors: donald pr.Childs Nerv Syst. 1991 Nov;7(7):399-401. doi: 10.1007/BF00304206.Childs Nerv Syst. 1991.PMID: 1794121
Cotton MF, Hartzenberg B, Donald PR, Burger PJ.Cotton MF, et al. Among authors: donald pr.S Afr Med J. 1991 Feb 2;79(3):139-42.S Afr Med J. 1991.PMID: 1994483
Schoeman J, Donald P, van Zyl L, Keet M, Wait J.Schoeman J, et al.Dev Med Child Neurol. 1991 May;33(5):396-405. doi: 10.1111/j.1469-8749.1991.tb14899.x.Dev Med Child Neurol. 1991.PMID: 2065826Clinical Trial.
Kalis NN, Donald PR, Burger PJ, Becker WB.Kalis NN, et al. Among authors: donald pr.Pediatr Infect Dis J. 1989 Jul;8(7):476-7. doi: 10.1097/00006454-198907000-00016.Pediatr Infect Dis J. 1989.PMID: 2502770No abstract available.