hi,
you may find the following link useful.
http://www.michener.ca/ce/postdiploma/sleep_med.php
Hi,
Sleep disorders is a vast subject and a super specialised one. when you say you want to study them , what do you mean? You could enetr in as a sleep technician who carries out the study under supervision of a sleep specialist. Or there is the option of doing a certificate course / fellowship/ specialisation post MD. You would have to be either a chest specialist/ neurologist / physician with avid interest in sleep disorders to pursue the specialisation courses. Goodluck.