Novel Mutations in ACVR1 Result in Atypical Features in Two Fibrodysplasia Ossificans Progressiva Patients Petrie, Kirsten A. ; Lee, Wen Hwa ; Bullock, Alex N. ; Pointon, Jenny J. ; Smith, Roger ; Russell, R. Graham G. ; Brown, Matthew A. ; Wordsworth, B. Paul ; Triffitt, James T. Abstract Publication: PLoS ONE Pub Date: March 2009 DOI: 10.1371/journal.pone.0005005 Bibcode: 2009PLoSO...4.5005P