What is the latest reference to body length in ICD-10 to call it perinatal moality rate?

Social & Preventive Medicine

What is the latest reference to body length in ICD-10 to call it perinatal moality rate?

A study is to be conducted with regards to the fat content…

'There has been a gradual increase in number of non-communicable disease cases…

All of the following are done to remove Confounding except