Dear Cedric and Luis,
How can I manage the visibility of menu items explicitly?
I started with creating new users and giving them access of pre-configured group "Health Doctor". This showed "Surgery" menu item which should be visible for "Surgeons" only and not for doctors with specialty "Family Medicine".
Thus we decided that we should not use existing groups and create our own groups by giving desired access to desired models. So, we created a group say "My Doctor". It does not have access to surgery but when user logs in, Surgery is there.
Thanks for your support.
Regards,
Khurram.