Surgical interference (the 1st category of difficulty)
Surgical interference (the 2nd category of difficulty)
Surgical interference (the 3rd category of difficulty)
Surgical interference by a specialist with second-level doctorate degree in medicine (the 1st category of difficulty)
Surgical interference by a specialist with second-level doctorate degree in medicine (the 2nd category of difficulty)
Surgical interference by a specialist with second-level doctorate degree in medicine (the 3rd category of difficulty)
