assistants, certified pursuant to Article 9 (commencing with Section 1337) of Chapter 2, licensed vocational nurses, licensed pursuant to Chapter 6.5 (commencing with Section 2840) of Division 2 of the Business and Professions Code, and registered nurses, licensed pursuant to Chapter 6 (commencing with Section 2700) of Division 2 of the Business and Professions Code, except both of the following s