- Partial characterization of the gastrointestinal weight changes produced in the female rat by 16,16-dimethylprostaglandin E2. Gilbertson, T.J., Ruwart, M.J., Stryd, R.P., Brunden, M.N., Friedle, N.M., Rush, B.D., Christianson, C.A. Prostaglandins (1983)