1 The Lethal Osteochondrodysplasias --;2 Mutations in Type I Procollagen Genes That Cause Osteogenesis Imperfecta --;3 Structural Defects in Inherited and Giant Platelet Disorders --;4 Genetic Aspects of Immunoglobulin A Deficiency --;5 Oxidative Phosphorylation Diseases: Disorders of Two Genomes --;Addendum.