(1) A proxy to vote the shares of a professional corporation organized for the purpose of practicing medicine may be given under the following conditions: (a) If the shareholder granting the proxy is a physician licensed in this state to practice medicine, the proxy may be given only to a shareholder of the same corporation who is also a physician licensed in this state to practice medicine, or to an attorney licensed to practice law in this state or another person similarly licensed.(b) If the shareholder granting the proxy is not a physician licensed in this state to practice medicine, the proxy may be given only to another shareholder of the same corporation, whether or not the other shareholder is a physician licensed in this state to practice medicine, or to an attorney licensed to practice law in this state or another person similarly licensed.(2) No voting trust may be created to vote the shares of a professional corporation organized for the purpose of practicing medicine.(3) Two or more shareholders of a professional corporation organized for the purpose of practicing medicine may enter into a voting agreement provided that the voting agreement does not transfer voting rights from a shareholder who is a physician licensed in this state to practice medicine to a shareholder who is not so licensed. Notwithstanding any provision of this subsection, voting rights may be transferred to an attorney licensed to practice law in this state or another person similarly licensed.