Section 306.03 shall not apply to the following in the ordinary course of their trade, business or profession; provided, however, this exception shall not be a defense to the doing of the acts prohibited in § 306.03 hereof:
Subd. 1. Practitioners;
Subd. 2. Pharmacists;
Subd. 3. Manufacturers;
Subd. 4. Pharmacists as manufacturers;
Subd. 5. Wholesalers;
Subd. 6. Warehousemen;
Subd. 7. Persons engaged in transporting the controlled substances as agent or employee of a practitioner, pharmacist, manufacturer, warehouseman, wholesaler or common carrier;
Subd. 8. Any patient as herein defined with respect to procuring, possession and use of a controlled substance in accordance with terms of a prescription and prescribed treatment;
Subd. 9. Persons who procure, possess or use the controlled substances for the purpose of lawful research, teaching or testing and not for sale;
Subd. 10. Lawfully licensed and registered hospitals or bona fide institutions wherein sick or injured persons are cared for and treated or bona fide hospitals for the treatment of animals.
(1987 Code, § 306.04)