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).
Mark is the same person that accompanied the apostle Paul during some of his missions and was referred to as John Mark (Acts 12:12, 25; 15:77-41). John Mark is the same person who is the author of the gospel of Mark even though it could actually be called the gospel of Peter.