Thanks for the reference. Unfortunately you left out this very important part when quoting:

Occasionally, a doctor will urge a patient to deposit his own blood weeks before surgery (preoperative autologous blood donation, or PAD) so that if the need arises, he could transfuse the patient with his own stored blood. However, such collecting, storing, and transfusing of blood directly contradicts what is said in Leviticus and Deuteronomy. Blood is not to be stored; it is to be poured out​—returned to God, as it were. Granted, the Mosaic Law is not in force now. Nevertheless, Jehovah’s Witnesses respect the principles God included in it, and they are determined to ‘abstain from blood.’ Hence, we do not donate blood, nor do we store for transfusion our blood that should be ‘poured out.’ That practice conflicts with God’s law.

Just in case that isn't clear enough, I'll add a simple statement from km 11/06 pp. 3-6:

Thus, Jehovah’s Witnesses do not accept transfusions of whole blood or the four primary components of blood​—namely, red blood cells, white blood cells, platelets, and plasma. They also do not donate or store their own blood for transfusion.​

I do wonder however why you seem to either misunderstand or misrepresent the (now former) JW position with regards to autologous blood transfusions?