Please list the diseases of the patients born after 1995-1-1 and have a normal Rhuematoid Factor.
diseases refers to Diagnosis; born after 1995/1/1 refers to YEAR(Birthday) > = 1995; normal Rhuematoid Factor refers to RA IN('-', '+-');
SELECT T1.Diagnosis FROM Patient AS T1 INNER JOIN Laboratory AS T2 ON T1.ID = T2.ID WHERE (T2.RA = '-' OR T2.RA = '+-') AND T1.Birthday > 1995-01-01