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  4. Berlucchi, Marco & Soresina, Annarosa & Redaelli de Zinis, Luca & Valetti et al. Sensorineural Hearing Loss in Primary Antibody Deficiency Disorders. The Journal of pediatrics.2008;153. 293-6.
  5. Richter D, Conley ME, Rohrer J, Myers LA et al . A contiguous deletion syndrome of X-linked agammaglobulinemia and sensorineural deafness. Pediatr Allergy Immunol. 2001(4);12(2):107-11. Figure legend: Figure1: Shiny thickened skin with deformities in small joints of hands in the index patient