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Some male birds and mammals congregate in communal courting grounds called leks.
Bay (left) and chestnut (sometimes called "sorrel") are two of the most common coat colors
Cataract extraction. The procedure involves a surgical removal of a cataract lens and its replacemen
Tubal ligation. To minimize the size of the incisions necessary, laparoscopic surgery may be used to
Cystic fibrosis is caused by a mutation in a protein called CFTR
A lesion called a plaque in the brain of an individual with Alzheimer disease. A ring of degeneratin