*{{citation|initiallast = Percy|initialfirst = D.H|2last = and Barthold|2first = S.W|finallast = |year = 2007|title = Pathology of laboratory rodents and rabbits|pub = Blackwell Publishing. pp. 3-123}} | *{{citation|initiallast = Percy|initialfirst = D.H|2last = and Barthold|2first = S.W|finallast = |year = 2007|title = Pathology of laboratory rodents and rabbits|pub = Blackwell Publishing. pp. 3-123}} |