/ Design Patterns. In software engineering, creational design patterns are design patterns that deal with object creation mechanisms, trying to create objects in a manner suitable to the situation. The basic form of object creation could result in design problems or added complexity to the design.
1 Gastroenterologist-specializes in diseases of the digestive system. 2  Geriatrician (Geriatric Medicine) - general practice physician who specializes in caring for older adults. 3  Hematologist-a hematologist specializes in diseases of the blood and bone marrow. 4  Hepatologist-specializes in diseases of the liver.
Hematology: The treatment of blood and blood system diseases such as cancer, lymphoma, serious anemia, and sickle cell disease. Find a hemotologist. HIV Disease Specialist: A physician who specializes in the treatment of HIV and HIV associated diseases and disorders.