Section 19. Physical examination

An injured employee claiming or entitled
  to compensation  shall  submit  to  such  physical  examination  as  the
  chairman  or  the  board  may  require.   The place, or places, shall be
  reasonably convenient for him. No physician selected  by  the  employer,
  carrier  or employee shall be present at or participate in any manner in
  such examination, but such employer or carrier shall, upon  request,  be
  entitled  to  have the employee examined immediately thereafter and upon
  the same premises by a qualified physician or physicians in the presence
  of such physician as the employee may select, if any. Proceedings  shall
  be  suspended and no compensation shall be payable for any period during
  which the employee may refuse to submit to examination.