A patient is on the sick leave for 4 months continuously from the date of injury. The treatment is going to last for 1-2 months. Who has the right to extend the duration of medical certificate for this patient?

Answer options

1. District doctor by agreement with a department chief
2. Medical advisory commission after inpatient treatment
3. Medical superintendent
4. Medico-social expert commission
5. Medical advisory commission after medico-social expert commission examination