* This video covers almost everything you can expect from V/Q mismatch and Aa gradient on USMLE Step 1.
* This topic is also given in First Aid 2015 on page no. 606 and page no. 614 in First Aid 2016.
*At 10:43 i said ZONE 3....it should be ZONE 2.

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* If you are first or second year medical student or if you have more than one year to prepare for USMLE Step 1 or any other exam then I strongly recommend you to watch Dr. Najeeb lectures to make your concepts very clear. If you don't have enough time to prepare for USMLE Step 1 then I would not recommend you to go through all the videos of Dr. Najeeb, just watch Neurology and Immunology.