1. Antitumor Effects of a Combined 5-Aza-2′Deoxycytidine and Valproic Acid Treatment on Rhabdomyosarcoma and Medulloblastoma in Ptch Mutant Mice
   Ines Ecke et al, 2009, Cancer Research CrossRef
2. Methylation of PTCH1a gene in a subset of gastric cancers
   Peng Du et al, 2009, World Journal of Gastroenterology CrossRef