First Constraints on the Photon Coupling of Axionlike Particles from Multimessenger Studies of the Neutron Star Merger GW170817.

We use multimessenger observations of the neutron star merger event GW170817 to derive new constraints on axionlike particles (ALPs) coupling to photons. ALPs are produced via Primakoff and photon coalescence processes in the merger, escape the remnant, and decay back into two photons, giving rise to a photon signal approximately along the line of sight to the merger. We analyze the spectral and temporal information of the ALP-induced photon signal and use the Fermi Large Area Telescope (Fermi-LAT) observations of GW170817 to derive our new ALP constraints.

Isolation of Aspergillus in three 2009 H1N1 influenza patients.

Objectives: To describe the association of Aspergillus with influenza.

Design/setting/sample: Three case reports of ICU patients with influenza complicated by the isolation of Aspergillus species are described and a review of the literature on the topic was performed.

Conclusions: Severe influenza cases can be complicated by Aspergillus infection.

Osteoporosis in men: epidemiology, diagnosis, prevention, and treatment.

Background: Osteoporosis and fragility fractures in men account for substantial health care expenditures and decreased quality of life.

Objective: This article reviews the most current information about the epidemiology, diagnosis, prevention, and treatment of osteoporosis in men.

Methods: Relevant literature was identified through a search of MEDLINE (1966-June 2003) limited to English-language studies in men.