the performance study either relates directly to a medical condition from which the minor concerned suffers or is of such a nature that it can only be carried out on minors;
baineann an staidéar feidhmíochta go díreach le riocht sláinte atá á fhulaingt ag an mionaoiseach lena mbaineann nó is imscrúdú é de chineál nach féidir a dhéanamh ach ar mhionaoisigh;