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By renewing our driver’s license at the DMV, most of us are aware of the process of registering to become an organ donor should the worst come to pass. But there is another group of organ donors — living donors — who are helping relatives, friends and even strangers by donating a kidney or part of their liver. Living donors who choose to give a kidney — the most commonly donated organ — can live a full life with the remaining kidney.

Confused about probiotics and prebiotics? Let’s unravel the mysteries of how prebiotic and probiotic foods promote a balanced gut and what role that plays in your overall wellness.

Remember, even researchers are just beginning to understand the complexity of digestive health: how each organ functions and what the microorganisms within them do to keep the whole digestive system in working order. Before you alter your diet and lifestyle to consume more probiotics and prebiotics, consult with your primary care physician for personal guidance on healthy eating for your gut.

In a surgical suite at Barnes-Jewish Hospital, a robotic arm snakes an ultra-thin, ultra-flexible tube through a patient’s airway. Once the tube reaches the lungs, the surgeon operating the device remotely uses a tiny camera to search the area for an abnormal growth, or nodule, that might be cancerous. Once located, a needle pierces the nodule for biopsy.