An Italian army twin register.
Gedda
L
L
Mendel Institute, Rome.
Messinetti
S
S
Brenci
G
G
Ronzani
G
G
D000328:Adult; D001076:Aptitude; D005260:Female; D006801:Humans; D007558:Italy; D008297:Male; D008889:Military Personnel; D009790:Occupations; D012042:Registries; D014427:Twins / Q000235:genetics / Q000523:psychology / Q000706:statistics & numerical data*