<?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%">M. Sakai</style></author><author><style face="normal" font="default" size="100%">R.S. Danziger</style></author><author><style face="normal" font="default" size="100%">R.-P. Xiao</style></author><author><style face="normal" font="default" size="100%">H.A. Spurgeon</style></author><author><style face="normal" font="default" size="100%">E.G. Lakatta</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Contractile response of individual cardiac myocytes to norepinephrine declines with senescence</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%">1992</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.ncbi.nlm.nih.gov/pubmed/1370751</style></url></web-urls></urls><pages><style face="normal" font="default" size="100%">H184-H189</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">1 31-1</style></issue></record></records></xml>