Table 1.

Donors’ respective countries, number of batches and mean donation volume

Group	Remuneration	Method collection plasma	Number batches	Mean plasma volume per donation (ml)
Group I
Finland	Unpaid	Recovered	6	288 ± 1a
France	Unpaid	Recovered	3	320 ± 7
Germany	Unpaid	Recovered	2	306 ± 1
The Netherlands	Unpaid	Recovered	10	318 ± 2
	Unpaid	Source	10	634 ± 5
Belgium	Unpaid	Recovered	10	280 ± 2
		Source	10	581 ± 7
Group II
United States	Unpaid	Recovered	5	317 ± 14
Group III
Germany	Compensated	Source	8	657 ± 95
Group IV
United States	Paid	Source	41	814 ± 13

Taking the plasma density (d = 1·024) in account, the volume per donation for each batch is calculated as follows:

Total donations weight per batch – container weight/number of donations per batch.

^aMean of all batches ± standard deviation.