<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Rui-Ping Xiao</style></author><author><style face="normal" font="default" size="100%">Salvatore Pepe</style></author><author><style face="normal" font="default" size="100%">Harold A. Spurgeon</style></author><author><style face="normal" font="default" size="100%">Maurizio C. Capogrossi</style></author><author><style face="normal" font="default" size="100%">Edward G. Lakatta</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Opioid peptide receptor stimulation reverses β-adrenergic effects in rat heart cells</style></title><secondary-title><style face="normal" font="default" size="100%">American Journal of Physiology - Heart and Circulatory Physiology</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">1997</style></year></dates><pages><style face="normal" font="default" size="100%">H797-H805</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">2</style></issue></record></records></xml>