John is a 15-year-old patient who plays on his high school basketball team. He says he is proud to be on the team's "first string." His mother brought him to the office because he is experiencing hearing loss and has frequent spasms in his legs. Which of the following are possible causes of these symptoms?

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The Answer of John is a 15-year-old patient who plays on his high school basketball team. He says he is proud to be on the team's "first string." His mother brought him to the office because he is experiencing hearing loss and has frequent spasms in his legs. Which of the following are possible causes of these symptoms?

John Is a 15-Year-Old Patient Who Plays on His High