Patient History: At five weeks old, baby Shannon struggled to keep food down. She vomited constantly and spit-up during feedings. At five months old, the vomiting continued and Shannon’s symptoms worsened – rashes and eczema covered her body. “Our five year old son told me that he didn’t like to sit next to Shannon because she was always getting sick,” says Megan, Shannon’s mother. “It got to the point where we couldn’t take...