In the past R.J. Benzie has collaborated on articles with T.A. Doran and S.S. Im. One of their most recent publications is Composition of the amniotic fluid and maternal serum in pregnancy☆. Which was published in journal American Journal of Obstetrics and Gynecology.
More information about R.J. Benzie research including statistics on their citations can be found on their Copernicus Academic profile page.