Landon Jones' case may be unique
                                
                                
                                    (Newser) -
                                    A year ago, Landon Jones, 12, suddenly lost his desire to eat and drink—and it hasn't come back. The case remains a mystery, and possibly unique, says a Mayo Clinic doctor. One day, the  Des Moines Register  reports, Landon had a normal appetite; the next, he woke up...