Feb 28 (Reuters) - Medison Biotech Ltd:
* SENT AN OPEN LETTER TO KNIGHT THERAPEUTICS'S BOARD
* SAYS BOARD SHOULD INSIST JONATHAN GOODMAN RELINQUISH HIS ROLE AT KNIGHT THERAPEUTICS OR HIS FINANCIAL STAKE IN COMPETING FAMILY BUSINESS
* SAYS TOGETHER WITH ITS AFFILIATES OWNS MORE THAN 10.4 MILLION SHARES, OR 7.3 PERCENT OF KNIGHT THERAPEUTICS