Alternating myocardial sympathetic neural function of athlete's heart in professional cycle racers examined with iodine-123-MIBG myocardial scintigraphy. - Koyama,K.; Inoue,T.; Hasegawa,A.; Oriuchi,N.; Okamoto,E.; Tomaru,Y.; Endo,K. (Ann Nucl Med, 2001)