 - History of regular alcohol consumption within 6 months of the study defined as: an average weekly intake of 14 drinks for males or 7 drinks for females. One drink is equivalent to 12 g of alcohol: 12 ounces 360 mL of beer, 5 ounces 150 ml of wine or 1.5 ounces 45 mL of 80 proof distilled spirits. 