RT Journal Article SR Electronic T1 Episodic physical and sexual activity increase risk for acute cardiac events JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 190 OP 191 DO 10.1136/ebm.2011.100044 VO 16 IS 6 A1 Viktor Čulić YR 2011 UL http://ebm.bmj.com/content/16/6/190.abstract AB