Adding the numbers, since they settle part of this. One practical note: write down what you did and when, before you need it. Reconstructing a timeline from memory three months later is how people end up unable to answer the one question that would have resolved it.
OP back with an update, since a thread like this is useless without one.
Follow-up: it was dead space. Switching to a low-dead-space fixed-needle syringe gave me the tenth dose back.
fiona_glasgow said:Switching to a low-dead-space fixed-needle syringe gave me the tenth dose back.
Careful with the causal language. Two things moving together in a period when five things changed is not a mechanism, and stating it as one makes the thread less useful to somebody reading it later.
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Browse GL Biochemfiona_glasgow said:Switching to a low-dead-space fixed-needle syringe gave me the tenth dose back.
No disagreement, though it depends on where somebody is starting from, and this thread has been assuming a starting point nobody stated.
If somebody has the primary source to hand I would rather cite it than paraphrase it.
fiona_glasgow said:Switching to a low-dead-space fixed-needle syringe gave me the tenth dose back.
This answered a question I did not know how to ask.