Lead-time bias and Length-time bias both cause overestimation of survival duration.  Lead-time bias: Overestimation of survival duration due to earlier detection by screening than clinical presentation.
Management of asymptomatic LVSD EF <=40%ACE-inhibitor or angiotensin II receptor blocker ARB [titrated to maximum tolerated dose]beta-blocker
Alcohol most jurisdictions:0.08 gm/dL 80 mg/dL Marijuana Washington state:5 ng/mL &Delta-9 THC see: http://www.ncbi.nlm.nih.gov/pubmed/25217548
Chlordiazepoxide Libriumwide therapeutic window"self-tapering" due to its long half-life 24-48 hours      Day 1: 50 - 100 mg PO QID     Day 2: 50 - 100 mg PO TID