PT - JOURNAL ARTICLE AU - Christopher D Hingston AU - Matt P Wise TI - Coffee brewing technique as a confounder in observational studies AID - 10.1136/heartjnl-2015-308288 DP - 2015 Oct 15 TA - Heart PG - 1686--1686 VI - 101 IP - 20 4099 - http://heart.bmj.com/content/101/20/1686.short 4100 - http://heart.bmj.com/content/101/20/1686.full SO - Heart2015 Oct 15; 101