130 HUMANE TREATMENT OF ANIMALS USED IN RESEARCH 
surveyed. However, many of the summary tables in this report 
represent less than this number. Some institutions could not 
answer all questions since the information requested was not 
available or the question was not applicable. Excellent co- 
operation was received from the personnel of all institutions 
surveyed. After each site visit, the survey teams returned the 
completed questionnaire to the Institute of Laboratory Animal 
Resources; and the information was tabulated by the Institute 
staff. The regional consultants then met to prepare this 
final report. 
It must be emphasized that the information in this 
report is representative only of the institutions surveyed 
since no standardized sampling method was employed in select- 
ing them. It must also be stated that the conclusions are 
based primarily on the individual experience of the site visi- 
tors. Objective criteria and standards for evaluating animal 
care are not yet available. This is an important unfinished 
task for which, it is hoped, this report will set the stage. 
- 3 - 
