ICD-10 code D70 for Neutropenia is a medical classification as listed by WHO under the range -Other disorders of blood and blood-forming organs .
Jesus included Peter in his inner circle when he took Peter, James, and John into the house of Jairus, where Jesus raised Jairus' daughter from the dead (Mark 5:35-43). Later, Peter was among those same disciples Jesus chose to witness the transfiguration (Matthew 17:1-9).
Peter is believed to have been his mentor after Christ ascended into heaven. Mark was also known as John Mark and sometimes referred to as John Marcus and was apparently the nephew of Barnabas. Mark was the writer of the gospel bearing his name but Peter is actually the one behind the gospel.