Relationship between the ABO blood group and COVID-19 susceptibility, severity and mortality in two cohorts of patients.

Background: Several articles reported the existence of an association between ABO blood groups and COVID-19 susceptibility. Group A and group O individuals showed a higher and lower risk, respectively, of becoming infected. No association was observed between ABO groups and mortality.

Astragalar and calcaneal morphology of the middle Eocene primate Anchomomys frontanyensis (Anchomomyini): Implications for early primate evolution.

Astragali and calcanei of Anchomomys frontanyensis, a small adapiform from the middle Eocene of Sant Jaume de Frontanyà (Southern Pyrenean basins, northeastern Spain) are described in detail. Though these bones have been known for some time, they have never been carefully analyzed in a context that is comprehensively comparative, quantitative, considers sample variation (astragalus n = 4; calcaneus n = 16), and assesses the phylogenetic significance of the material in an explicit cladistic context, as we do here. Though these bones are isolated, regression analyses provide the first formal statistical support for attribution to A.

H. pylori eradication does not reduce paraprotein levels in monoclonal gammopathy of unknown significance (MGUS): a prospective cohort study.

Monoclonal gammopathy of unknown significance (MGUS) is a chronic haematological alteration that carries a 1% risk per year of malignant evolution. The origin of this disturbance remains unknown. Previous reports have suggested that a subgroup of patients presenting MGUS might cure after Helicobacter pylori eradication.