CPA stands for Cost / or Commissions per Action and is essentially an umbrella type for a number of other models such as CPI and CPS. This is the most popular model among publishers because it offers ...

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Biopsies guided by high resolution ultrasound are as effective as those using MRI in diagnosing prostate cancer, an international clinical trial has shown.

It is also ideal for interventional radiology training. Conclusions It is feasible to adopt the human placenta ... All 18 placentas were examined macroscopically and the diameters of the first order ...