/ 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.
What Can I Expect if Sent to a Hematologist? A hematologist is a doctor who specializes in studying, diagnosing, and treating disorders of the blood, such as leukemia, HIV, and clotting disorders. This specialty is particularly important because the blood is the method that the body uses to deliver oxygen and nutrients to tissues.