Author response to invited commentary by Heathcock.
Grant-Beuttler
Marybeth
M
Palisano
Robert J
RJ
Miller
Debra P
DP
Wagner
Barbara Reddien
BR
Heriza
Carolyn B
CB
Shewokis
Patricia A
PA
D000843:Ankle Joint; D003286:Contracture / Q000517:prevention & control*; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D008297:Male; D018482:Muscle, Skeletal / Q000254:growth & development*; D026741:Physical Therapy Modalities; D013165:Splints; D013710:Tendons / Q000254:growth & development*