“…The following in situ probes were used: axin2 (kind gift of R. Dorsky), dkk1 (gift from C. Houart), follistatin (Bauer et al, 1998), otx1 (Li et al, 1994), atoh7 (atoh7, (Kay et al, 2001), sox2 (Okuda et al, 2006), myca and cyclinD1 , pax6a (Krauss et al, 1991), stat3 (Krauss et al, 1991), her6 (Pasini et al, 2004), meis1 (Waskiewicz et al, 2001), vsx2 (Barabino et al, 1997 …”