Waern A. Urban, Lidell C., and Hellsing K. 1982. “Alcohol Intake, Serum β2-Microglobulin and Ventricular Extrasystoles: Factors Related to Death in Five-Year Follow up of Middle-Aged Men”. Upsala Journal of Medical Sciences 87 (2):119-25. https://doi.org/10.3109/03009738209178416.