Examples of telephone directory

• Two participants did not even have the usual list of registered homes and had to rely on the telephone directory.

• For instance, it is not customary to publish one's mobile number in a telephone directory.

• Three practices that did not respond to the initial letter were not listed in the telephone directory.

• The high school graduates were located by matching names from the high school yearbook to addresses in the telephone directory.

• Using a reverse telephone directory, an enumeration was made by phone of all households with listed telephone numbers.

• A postal questionnaire was sent to 120 homes, chosen at random from the local telephone directory, in each of the 8 towns.

• Controls were obtained for each case by telephoning sequentially the phone numbers on a randomly selected page of the telephone directory for the district in which their case resided.

• The research team does not claim to produce a full-scale systematic review, and readers are relieved of the need to thumb through a telephone directory of appraisals of primary studies.