Pulmonary Embolism Support Group
By far the most common form of pulmonary embolism is a thromboembolism, which occurs when a blood clot, generally a venous thrombus, becomes dislodged from its site of formation and embolizes to the arterial blood supply of one of the lungs. Symptoms may include difficulty breathing, pain during breathing, and more rarely circulatory instability and death.
less than 40 kg/m2 "is always bad, and in fact not a single study exists to suggest that weight loss in chronic illness makes patients live longer."
Now where did I put that cream puff? LOL
And lighten up guys! This isn't a joke but it certainly isn't intended to give advice to anyone whether they should lose weight or not.
Read the entire link and see that there are detractors on this finding, as there should be. (Science at work)
And no mention of leptin.