Wilasrusmee, Chumpon, Siribumrungwong, Boonying, Phuwapraisirisan, Samart, Poprom, Napaphat, Woratanarat, Patarawan, Lertsithichai, Panuwat, Attia, John, Thakkinstian, Ammarin. Biomed Central; 2017. Developing and validating of Ramathibodi Appendicitis Score (RAMA-AS) for diagnosis of appendicitis in suspected appendicitis patients.