[1] UNIV LIVERPOOL, OLIVER LODGE LAB, LIVERPOOL, ENGLAND
[2] UNIV ATHENS, ATHENS, GREECE
[3] AUSTRIA AKAD WISSENSCH, INST HOCH ENERGIE PHYS, VIENNA, AUSTRIA
[4] RUTHERFORD HIGH ENERGY LAB, CHILTON, DIDCOT, BERKSHIRE, ENGLAND
[5] NUCL RES CTR DEMOCRITUS, ATHENS, GREECE