Published Online:1 Jun 1991https://hdl.handle.net/10520/AJA03701263_1416
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Volume 23, Issue 2 | Jun 1991
Information
Copyright © 1991, Department of Agriculture (South Africa)
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Disclosure
The authors confirm that the manuscript has been read and approved by all named authors and that there are no other persons who satisfied the criteria for authorship but are not listed. The authors confirm that they have given due consideration to the protection of intellectual property associated with this work and that there are no impediments to publication, including the timing of publication, with respect to intellectual property.
Ethical conduct of research
The authors state that they have obtained appropriate institutional review board outlined in the Declaration of Helsinki for all human or animal experimental investigations. A signed informed consent document has been obtained from all participants included in the study.
