Deep Vein Thrombosis (DVT) Support Group
Deep-vein thrombosis, also known as deep-venous thrombosis or DVT, is the formation of a blood clot ("thrombus") in a deep vein. It can be caused by something preventing blood from circulating or clotting normally. Join the support group if you are coping with DVT and find others who are going through the same challenges.
I doubt alcohol alone was the sole cause. Hope you're healing well!
Have you been checked for clotting disorders?
As far as athletes, there are are a number of combined factors working against them but no studies to date have deteremined if they are at any greater risk than any other patient:
http://www.stoptheclot.org/news/article126.htm
As others mentions, I tend to think there may be another associated risk factors which caused the clot
As far as the incident in Japan, dehydration was longer than a few days. Prolonged standing (those helping), immobilization, dehydration, stress and I'm sure other risk factors contributed to the rise in incident rates.
http://www.ncbi.nlm.nih.gov/pubmed/22728376