Johnson et al[14] found that compared with children without NF1, those with NF1 participate less in various social activities, that older people with NF1 often feel lonely, and that many people with NF1 may have a life situation that leads to reduced sun exposure, all of which may offset the increased risk of melanoma caused by NF1 mutations. Here, NF1 is linked to neurofibromatosis type 1.