When the writer telephoned him to inform him that an attempt would be made to recover the wreck, he asked to be kept informed.
The controls were approached first by letter and then telephoned to explain the study before being interviewed in their homes.
Once more, nonresponders were telephoned after ten days.
Similar patients from the lead author's practice were telephoned and invited to comment.
Potential participants were telephoned and an interview was arranged if they consented to take part in the study$.
