What do some doctors have against smartphones?

Used appropriately, smartphones and tablets can be a powerful adjuncts to learning, writes James Lawler. 

I’VE been warned by academics at my university multiple times before about using a smartphone or tablet during clinical placements, especially in general practice where I’ll soon start another rotation:

"It’s rude to use a mobile phone in General Practice."

"You might be looking up drug names to help your understanding, but