You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is In Mckern and Stewa maturation score of skeletal age, which of the following epiphyseal union is not used? and explain in detail?
Mckern and Stewa maturation score of skeletal age Humerus - Proximal end and medial epicondyle Radius - Distal end Femur - Head and Distal end Iliac crest. Sacrum--Lateral poion and 3,4th segments. The scoring is given based on the degree of epiphyseal union that is: