Insurance — Personal injury protection — Independent medical examination — Physician who did not have own medical practice in years preceding IME but who performed temporary office coverage for other chiropractors for 20 days during that time was in “active practice” within meaning of statute requiring that IME physician be in active practice — Statute requires only that physician devote professional time to evaluation, diagnosis or treatment of patients, not that physician regularly or continuously treat patients — Motion to disqualify physician and strike IME is denied