/ 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.
Internists- These doctors focus on medicines related to adults and have special expertise in the areas related to the prevention and treatment of adult diseases. Medical Geneticist - A doctor who is responsible for testing, identifying and treating patients with genetic diseases and disorders. Microbiologist - A microbiologist is a doctor who studies the causes, diagnosis and treatment of infectious diseases where microbes are involved.