TY - RPRT TI - Age-related changes of sinus node function and autonomic regulation in subjects without sinus node disease--assessment by pharmacologic autonomic blockade. AU - K Kuga AU - I Yamaguchi AU - Y Sugishita PY - 1993 DO - 10.1253/jcj.57.760 UR - https://pubmed.ncbi.nlm.nih.gov/8355393/ ID - 8355393 ER -