- Adherence and mental side effects during hepatitis C treatment with interferon alfa and ribavirin in psychiatric risk groups. Schaefer, M., Schmidt, F., Folwaczny, C., Lorenz, R., Martin, G., Schindlbeck, N., Heldwein, W., Soyka, M., Grunze, H., Koenig, A., Loeschke, K. Hepatology (2003)