Efficacy of single - voided urine metanephrine and normetanephrine assay for diagnosis pheochromocytoma. - Ito,Y.; Obara,T.; Okamoto,T.; Kanbe,M.; Tanaka,R.; Ihara,M.; Okamoto,J.; Yamazaki,K.; Jibiki,K. (World J Surg, 1998)