Author:Phipps, J.B. Treatments MMacklin2002a Macklin2006a PPhipps1988a Phipps1988b Phipps1990a Phipps1990b Phipps1991a Phipps1991b P cont.Phipps1992a Phipps1998a Phipps1999a Phipps2003a Phipps2005a Phipps2006a Phipps2006b Phipps2006c P cont.Phipps2007a Phipps2008a Phipps2012a RRobertson1992a Rohrer1991a Rohrer1994a SSinnott1983a