I was just exploring the new PA site and I came across this survey on the Stichting Tekort site. It looks at the diagnosis and treatment of 1500 patients (presumably Dutch).
The amazing thing was that, after loading doses, almost 60% of those receiving injections were getting them once a month, or better!
stichtingb12tekort.nl/surve...
Perhaps this should be mentioned to doctors who are reluctant to prescribe anything more frequent than every 3 months.