Many ecological processes are strongly influenced by spatial scale 6,7,8,9, causing a major dilemma for experimental biologists, as large-scale field experiments are often prohibitively expensive.

ABSTRACT: Background: Despite the widespread use of lung ultrasound in clinical practice, there are no clear evidence-based guidelines for teaching lung ultrasound in the Democratic Republic of Congo ...

† School of Public Health, Seoul National University, Gwanak, Seoul 151-742, Republic of Korea ‡ Department of Occupational and Environmental Health, Yongin University, Yongin 449-714, Republic of ...

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