Table 4. Search strategies for EMBASE.

Search: 22 October 2012
No.	Query	Results
#5	#3 AND #4	1312
#4	‘randomised controlled trial’/exp OR ‘randomised controlled trial’ OR ‘randomised controlled trials’ OR ‘randomized controlled trial’/exp OR ‘randomized controlled trial’ OR ‘randomized controlled trials’/exp OR ‘randomized controlled trials’ AND [humans]/lim AND [english]/lim AND [embase]/lim AND [1-1-1966]/sd NOT [22-10-2012]/sd AND [1966-2012]/py	249285
#3	#1 AND #2	2862
#2	‘carbohydrate restricted diet’/exp OR ‘carbohydrate restricted diet’ OR ‘carbohydrate restricted diets’ OR ‘high fat diet’/exp OR ‘high fat diet’ OR ‘high fat diets’ OR ‘fat restricted diet’/exp OR ‘fat restricted diet’ OR ‘fat restricted diets’ OR ‘ketogenic diet’/exp OR ‘ketogenic diet’ OR ‘ketogenic diets’ AND [humans]/lim AND [english]/lim AND [embase]/lim AND [1-1-1966]/sd NOT [22-10-2012]/sd AND [1966–2012]/py	11176
#1	‘randomized controlled trial’/exp OR ‘randomized controlled trial’ OR random*:ab,ti OR trial:ti OR allocat*:ab,ti OR factorial*:ab,ti OR placebo*:ab,ti OR assign*:ab,ti OR volunteer*:ab,ti OR ‘crossover procedure’/exp OR ‘crossover procedure’ OR ‘double-blind procedure’/exp OR ‘double-blind procedure’ OR ‘single-blind procedure’/exp OR ‘single-blind procedure’ OR (doubl* NEAR/3 blind*):ab,ti OR (singl*:ab,ti AND blind*:ab,ti) OR crossover*:ab,ti OR cross+over*:ab,ti OR (cross NEXT/1 over*):ab,ti AND [humans]/lim AND [english]/lim AND [embase]/lim AND [1-1-1966]/sd NOT [22-10-2012]/sd AND [1966–2012]/py	879594