Multisection^W contrast PR+at rest+maximal sphincter contraction+during straining+during defecation
multisection^w contrast pr+at rest+maximal sphincter contraction+during straining+during defecation
Multisection^W contrast PR+at rest+maximal sphincter contraction+during straining+during defecation
multisection^w contrast pr+at rest+maximal sphincter contraction+during straining+during defecation