Hoerauf Achim, Büttner Dietrich W, Adjei Ohene, Pearlman Eric
Bernhard Nocht Institute for Tropical Medicine, Department of Helminthology, Bernhard-Nocht-Strasse 74, 20359 Hamburg, Germany.
BMJ. 2003 Jan 25;326(7382):207-10. doi: 10.1136/bmj.326.7382.207.