1. Atien Priyanti and I.G.A.P. Mahendri; Indonesian Centre for Animal Research and Development; Jl. Tentara Pelajar No. 10 Bogor 16114 West Java Indonesia
2. School of Agriculture and Food Sciences; University of Queensland; St Lucia Brisbane Qld. 4072 Australia
3. Vyta W. Hanifah; Indonesian Centre for Agricultural Technology Assessment and Development; Jl. Tentara Pelajar No. 10 Bogor 16114 West Java Indonesia