For example a cell culture may be produced to grow {HEAD ~ neocartilage} by isolating {TAIL ~ immature chondrocytes}, e.g., fetal, neonatal, and preadolescent chondrocytes from donor articular cartilage 
by isolating
For example a cell culture may be produced to grow { HEAD ~ neocartilage } by isolating { TAIL ~ immature chondrocytes } , e.g. , fetal , neonatal , and preadolescent chondrocytes from donor articular cartilage
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH