Avian Leukemia Sarcoma Virus

A subtype of type A influenza virus found chiefly in birds, but infections with these viruses can occur in humans.

A taxonomic class of egg-laying, endothermic vertebrates. The forelimbs of these bipedal animals have been modified to form wings. Modern birds have…

A stimulus causing an organism to behave so as to minimize exposure to it (as in negative reinforcement or punishment procedures). …

A question about an individual's average severity of pain.

The substitution of missing data with a value that represents the average of a group of specified values.

A semiquantitative analysis of the average uptake of analyte by body tissue in relation to the total administered dose of the…