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Recorded observations do not establish joining or departure dates. Repeated overlapping observations are consolidated; distinct periods remain separate.

1. University of TorontoRole unavailableRecorded — · last recorded —Joining and departure dates unconfirmed
2. University of TorontoRole unavailableRecorded — · last recorded —Joining and departure dates unconfirmed
3. University of TorontoRole unavailableRecorded — · last recorded —Joining and departure dates unconfirmed