1. Laboratory of Histology and Developmental Biology, Faculty of Biology; University of Bucharest; Splaiul Independentei 91-95 Bucharest R-050095 Romania
2. Grigore Antipa National Museum of Natural History; Kiseleff 1 Bucharest R-011341 Romania
3. Department of Cellular and Molecular Biology; National Institute of Research and Development for Biological Sciences; Splaiul Independentei 296 Bucharest R-060031 Romania