handtherapy rehabilitation therapist hand nailbedinjuries fingerjoints stiffsmalljoints rheumatoidthumb thumbfunction standardisednorms goniometer rangeofmotionassessment rangeofmotionthumb ergonomicworkstations wristtreatmentmodalities wristinjuries swellingreduction continuouspassivemotion jamardynamometer gripstrengthmeasurement tendonglide extensortendon fingertipinjuries rheumatoidarthritis
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