title: H7N9 avian influenza virus - search and re-search.
authors.affiliation: Key Laboratory of Medical Molecular Virology, Shanghai Medical College, Fudan University , Shanghai 200032, China.
authors.forename: Yu-Mei
authors.initials: YM
authors.lastname: Wen
authors.affiliation: Philipps-Universität Marburg, Institut für Virologie , D-35043 Marburg, Germany.
authors.forename: Hans-Dieter
authors.initials: HD
authors.lastname: Klenk