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In page Physical therapy:

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Educational criteria for physical therapy providers vary from state to state, country to country, and among various levels of professional responsibility. Most U.S. states have physical therapy practice acts that recognize both physical therapists (PT) and physical therapist assistants (PTA) and some jurisdictions also recognize physical therapy technicians (PT Techs) or aides. Most countries have licensing bodies that require physical therapists to be member of before they can start practicing as independent professionals.[citation needed]