Which of the following factors led to the highest rates of depression? having a depression gene.
having high levels of stress and/or abuse.
having two short 5-HTT alleles and high levels of stress and/or abuse.
having one short and one long 5-HTT alleles, regardless of stress levels.

What is the difference between a license and a certificate in the healthcare system? a. a certificate grants the freedom to practice, while a license only confirms professional qualifications. b. a license grants the freedom to practice, while a certificate only confirms professional qualifications. c. medical doctors receive licenses, and nurses receive certificates. d. medical doctors receive certificates, and nurses receive licenses. i'll give you 30