Ovid MEDLINE sequence and terms
1.	Air Pollution/
2.	air pollutants/ or gasoline/ or hydrogen sulfide/ or particulate matter/ or sulfur dioxide/ or vehicle emissions/
3.	(“Air pollution” or “air pollutant”).mp. [mp=title, abstract, original title, name of substance word, subject heading word, keyword heading word, protocol supplementary concept word, rare disease supplementary concept word, unique identifier]
4.	(“ambient air pollution” or “outdoor air pollution”).mp. [mp=title, abstract, original title, name of substance word, subject heading word, keyword heading word, protocol supplementary concept word, rare disease supplementary concept word, unique identifier]
5.	1 or 2 or 3 or 4
6.	asthma/ or bronchitis/ or respiration disorders/
7.	(“respiratory health” or “asthma” or “respiratory condition*”).mp. [mp=title, abstract, original title, name of substance word, subject heading word, keyword heading word, protocol supplementary concept word, rare disease supplementary concept word, unique identifier]
8.	(“respiratory symptoms” or “wheeze*” or “respiratory function” or “pulmonary function”).mp. [mp=title, abstract, original title, name of substance word, subject heading word, keyword heading word, protocol supplementary concept word, rare disease supplementary concept word, unique identifier]
9.	6 or 7 or 8
10.	Child/
11.	(“child*” or “adolesc*” or “teen*” or “youth” or “pediat*”).mp. [mp=title, abstract, original title, name of substance word, subject heading word, keyword heading word, protocol supplementary concept word, rare disease supplementary concept word, unique identifier]
12.	10 or 11
13.	canada/ or alberta/ or british columbia/ or manitoba/ or new brunswick/ or “newfoundland and labrador”/ or northwest territories/ or nova scotia/ or nunavut/ or ontario/ or prince edward island/ or quebec/ or saskatchewan/ or yukon territory/
14.	(“Canada” or “Vancouver” or “Edmonton” or “Calgary” or “Victoria” or “Regina” or “Saskatchewan” or “Winnipeg” or “Toronto” or “Hamilton” or “Windsor” or “Mississauga” or “Montreal” or “Halifax” or “Ottawa” or “Kingston” or “London”).mp. [mp=title, abstract, original title, name of substance word, subject heading word, keyword heading word, protocol supplementary concept word, rare disease supplementary concept word, unique identifier]
15.	13 or 14
16.	5 and 9 and 12 and 15
17.	limit 16 to yr=”2004 -Current”
CINAHL Plus sequence and string terms*
1.	Air pollut*
2.	(Respirat* OR Asthm* OR Pulmon*)
3.	1 and 2
4.	(Child* OR adolescen*)
5.	3 and 4
Scopus exact string terms
TITLE-ABSKEY
(AIR POLLUT* AND (RESPIRAT* OR ASTHM* OR PULMON*) AND (CHILD* OR ADOLESCEN*) AND CANAD*)
AND SUBJAREA
(MULT OR AGRI OR BIOC OR IMMU OR NEUR OR PHAR OR MULT ORMEDI OR NURS OR VETE OR DENT OR HEAL)
AND PUBYEAR > 2003
CAB abstracts
(“air pollut*” AND “respirat*” AND “child*” AND “Canada”).
Indexes=CAB Abstracts Timespan=2004–2014

^*Limiters - Published Date: 20040101–20140231; Geographic Subset: Canada; Age Groups: All Child