Which of the following are possible Health Insurance Portability and Accountability Act (HIPAA) violations?
a. Denying a patient access to their chart
b. Confirming to a local newspaper that a well-known politician is a patient
c. Requiring patients to indicate their primary complaint using a sign-in sheet on the reception desk
d. Sharing medical records with the referring physician on file
e. Releasing a partial medical record to a judge after a subpoena is issued
f. Sending lab results to a patient's spouse listed on the HIPAA release form