In addition to hedgehog polypeptide, a TGF β factor may also be utilized in {HEAD ~ the method} of {TAIL ~ the invention} 
In addition to hedgehog polypeptide , a TGF β factor may also be utilized in { HEAD ~ the method } of { TAIL ~ the invention }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL