https://www.bmj.com/content/374/bmj.n1937
Top right under Article Tools. Click on Respond to this article. You have to give your name etc. Be careful with the address - you have to fill it in, and it is published, so only give as much of your address as you want public. I just fill in UK.
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You can't edit once submitted, so check carefully.
And you have to wait to see if it's got through. I made the mistake of thinking it hadn't and submitted again.
You get an automated email saying it's been received, and then you wait for an editor to approve it before it appears.
Thanks @Trish @Caroline Struthers just submitted this* and got the auto-acknowledgement email.
*"Dear Editor
NICE published its draft updated guideline on ME/CFS on 10 Nov 2020. There are comments in this article re the quality of the evidence. If anyone is concerned re NICE's evidence review e.g. the determination that "The majority of the evidence was of low and very low quality"* then they have had had ample opportunity to challenge that [*page 317 -https://www.nice.org.uk/guidance/GID-NG10091/documents/evidence-review-7] .
Nor is there anything for researchers who e.g. wish to evaluate exercise, or psychological interventions, to fear from this review. Typically the studies determined to be of "low and very low quality" were unblinded and used subjective outcome criteria (questionnaires). Fluge and Mella e.g., who evaluated Rituximab in ME/CFS, used actigraphy/actimetry, an objective outcome indicator. In fact the PACE study was intended to include actigraphy/actimetry; however, these objective outcome criteria were dropped. Had objective outcome criteria been included in PACE then the quality of the evidence would not have been considered "low /very low quality". Of course objective outcome criteria are likely to have shown that exercise [GET] and psychological interventions [CBT] weren't effective.
To summarise, there is nothing in the NICE review for those wishing to carry out research into exercise, or psychological interventions, to fear - just those wishing to carry out "low and very low quality" studies using subjective outcome criteria (questionnaires) rather than objective outcome criteria (actigraphy/actimetry). From a Doctor's perspective there is a need for objective evaluation of interventions - the NICE review is therefore a step in the right direction.