Not all stoops are due to osteoporosis.

All opinions are not equal.

To the Editor: Gibbons et al1 detail the “noble” and Herculean task of developing American College of Cardiology/American Heart Association cardiovascular guidelines. Recommendations are based on either experimental results or opinion, with the latter being considered of uniformly lower evidentiary importance. The contribution of opinion to the guidelines is substantial in that opinion supports...

Not all laboratories are alike.

KLUG et al. [1] have reported observer variability within and between two experienced observers of a number of lung function measurements in preschool children. One of the methods assessed was the measurement of airway resistance by the interrupter technique (Rint). In their laboratory, Rint measurements have high interobserver variability, although no systematic bias. In our laboratory interob...

FABP9 Mutations Are Not Detected in Cases of Infertility due to Sperm Morphological Defects in Iranian Men

Not all seizures are epilepsy also applies to the military.

Commentary The diagnosis of psychogenic nonepileptic seizures (PNES) continues to be clinically challenging despite increasing evidence that delay in diagnosis is related to increased use/cost of medical services; poor quality of life; psychiatric comor-bidities, including posttraumatic stress disorder (PTSD) and depression; medically unexplained symptoms; family dysfunc-tion; unemployment; and...

Not All Effects Are Created Equal: A Rejoinder To Sawilowsky