A clinch positioning mechanism of a stapler is provided. The toggle-lever mechanism in turn includes a first and a second articulated connecting link, angularly movable with respect to each other, pivotally connected to a control rod of the actuator, respectively to the angularly movable gripping member. Such a model may derive the predicted platen temperature from an observed temperature of a heat sink in the thermal printer. The invention accurately predicts risk of a medical condition or progression of a medical condition utilizing an interactive administration of a set of core survey questions combined with diagnostic data and places patients efficiently, reliably, and accurately into the appropriate treatment intervention programs. A one-to-one correspondence between one URL and a second, predictable network address for the discussion of the original URL allows everyone who shares an interest in a URL to be funneled into a single discussion about that URL. The headgear can further include an aperture positioned adjacent the channel and open to the channel.