Notice Of Cessation Of Substantial Shareholding

Part I
1.	Date of notice to issuer	27/05/2008
2.	Name of Substantial Shareholder	UBS AG
3.	Notice Type	Notice of a Change in the Percentage Level of a Substantial Shareholder's Interest or Cessation of Interest.
Part II - Not Required
Part III
1.	Date of change of Interest	26/05/2008
2.	The change in the percentage level	From 4.66 % To 4.33 %
3.	Circumstance(s) giving rise to the interest or change in interest	# Others THE CHANGE IS A RESULT OF THE FOLLOWING: (1) DECREASE IN SHARES IN BIO-TREAT TECHNOLOGY LIMITED RECEIVED AS COLLATERAL WHICH CARRY VOTING RIGHTS; (2) DECREASE IN DISCRETIONARY POSITIONS HELD ON BEHALF OF UBS GLOBAL ASSET MANAGEMENT CLIENTS; PARTIALLY OFFSET BY (3) INCREASE IN BORROWED SHARES IN BIO-TREAT TECHNOLOGY LIMITED WHICH CARRY VOTING RIGHTS
4.	A statement of whether the change in the percentage level is the result of a transaction or a series of transactions:	A SERIES OF TRANSACTIONS
Part IV
1.	Holdings of Substantial Shareholder, including direct and deemed interest :
	Direct Deemed No. of shares held before the change 4,813,640 41,491,683 As a percentage of issued share capital 0.54 % 4.66 % No. of shares held after the change 4,813,640 38,628,683 As a percentage of issued share capital 0.54 % 4.33 %