. . "non-response bias" . . "less detectable" . "biases" . "preservational bias" . "sample bias" . "biased" . "in aggregate data are misleading" . "biasing the sample" . . . "more noticeable" . "Sampling bias" . "unbiased" . "non-random" . "easier to detect" . "Sampling bias#Spotlight fallacy" . "sample selection" . "sampling biases" . . "sampling bias" . . "biased sample" . "Sampling bias" . "bias" . "clinical samples" . .