“ first drink” or “age at first use” or “age at initiation” or “age of initiation” or “early initiation”).ab.age of onset.sh.1 or 2(“drinking” or “alcohol”).ab.(alcohol or drinking).sh.4 or 53 and 6(“alcohol-related problems” or “alcohol related problems” or “alcohol abuse” or “alcohol dependence” or “problem drinking” or “problem-drinking” or “hazardous drinking” or “hazardous-drinking” or “alcohol use” or “addiction” or “alcoholism”).ab.(alcohol abuse or alcohol dependence or problem drinking or hazardous drinking or addiction or alcoholism).sh.8 or 910 and 7
