https://digitalarchive.tpl.ca/internal/media/dispatcher/2075212/fullHow it works: Dr. John MacKenzie, who recently retired as co-ordinator of the hand clinic at the Workers' Compensation Board's Downsview Rehabilitation Centre, uses a diagram to explain injuries to workers who are sent to the clinic for treatment. he hopes to continue his research into hand injuries.7/2/1985TSPA_0130054F0Picture7672714317168