The Nature Index 2025 Research Leaders — previously known as Annual Tables — reveal the leading institutions and countries/territories in the natural and health sciences, according to their output in ...

We were unable to process your request. Please try again later. If you continue to have this issue please contact [email protected]. The performance of prognostic models for COVID-19 is ...

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Patient 1, a 49-year-old man, body mass index (BMI) of 31, reported having 1 week of ongoing abdominal pain, and that over the course of the previous day he had increasing shortness of breath.

Patients with COPD who travel to high altitudes have an estimated PaO2 decrease of 0.84 kPa with each 1000 meter of altitude gain. High-altitude travel in patients with chronic obstructive pulmonary ...