메이요 클리닉. 크론병. httpswww.mayoclinic.orgdiseasesconditionscrohnsdiseasesymptomscausessyc 1월 3일에 액세스했습니다.

Mayo Clinic. Crohns disease. Available at httpswww.mayoclinic.orgdiseasesconditionscrohnsdiseasesymptomscausessyc Accessed on January th,.