2Lai EJ, Calderwood AH,Doros G, et al. The Boston bowel preparation scale: a valid and reliable instrument for eolonoseopyoriented research[J], gastrointestinal Endose, 2009,69 (3 Suppl ) : S620-625.
4Lai EJ ,Calderwood AH ,Doros G ,et al .The Boston bowel- preparation scale :a valid and reliable instrument foreolonoscopy- oriented research [J].gastrointestinal Endose,2009,69 (3 Suppl ) : $620-625.