In As You Like It, there is obvious sibling rivalry and antagonism between Orlando and Oliver, and also between Duke Frederick and Duke Senior. Most adaptations of Sherlock Holmes depict sibling rivalry with his brother, Mycroft Holmes. In John Steinbecks East of Eden, the brothers Cal and Aron Trask are counterparts to Cain and Abel of the Bible story. A Song of Ice and Fire contains numerous examples, such as that between Stannis Baratheon and Renly Baratheon. After their eldest brother Robert Baratheons death they contend for the Iron Throne, Stannis finally killing Renly through dark magic on the night before Renly intends to kill Stannis in battle, though it is left unclear whether he is aware of his role in Renlys death. The history of Westeros also contains "The Dance of the Dragons", in which Princess Rhaenyra Targaryen and her half-brother Aegon II Targaryen fought over the Iron Throne after their Father Viserys I Targaryens death, Aegon eventually killing Rhaenyra, but being poisoned shortly after, leading to Rhaenyras son Aegon III becoming king. In film and television
Sibling rivalry is a common theme in media that features child characters, reflecting the importance of this issue in early life. These issues can include jealousy on the birth of a new baby, different sibling roles, frequent arguments, competitiveness for mothers affection, and tensions between step-siblings. Adult siblings can also be portrayed with a rivalrous relationship, often a continuation of childhood conflicts. Situation comedies exploit this to comic effect. Sibling relationships may be shown as alternately loving and argumentative.
Atrichia with papular lesions (a.k.a. "Papular atrichia") is a diffuse hair loss caused by an abnormality of the human homologue of the mouse hairless gene. : 635 : 762 It is associated with HR. See also
Cicatricial alopecia
List of cutaneous conditions

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