Sentence:  Since a Skeletal Age rating can be made at any age during growth , from <WSD>Elbow</WSD> , Shoulder , Knee , or Foot as well as Hand , it seems to be the method of choice when one wishes to study most aspects of skeletal developmental progress during childhood . 
Meaning of the word marked with <WSD> tags:  hinge joint between the forearm and upper arm and the corresponding joint in the forelimb of a quadruped