Lin, S.H., Liu, C.M., Chang, S.S., Hwu, H.G., Liu, S.K., Hwang, T.J., Hsieh, M.H., Guo, S.C., and Chen, W.J., Familial aggregation in skin flush response to niacin patch among schizophrenic patients and their nonpsychotic relatives. Schizophrenia Bulletin, 2007. 33: 174-82.