The phrase "again as mentioned" is correct and usable in written English.
It can be used to refer back to something that has already been stated or discussed previously in the text.
Example: "As we discussed in the previous meeting, again as mentioned, the project deadline is approaching quickly."
Alternatives: "as previously stated" or "as noted earlier".
In the case of advertising, again as mentioned on this blog, the industry's code of conduct includes requirements to be socially responsible (ie, no pitching of booze ads at minors), and to avoid causing deliberate offence (ie, be careful with the sex and violence, especially when young people and children are involved).
Then, samples were extracted again as mentioned above (acidic extracts).
After that, the clear liquid was collected and the residue was extracted with the same process again as mentioned above.
Again, as mentioned previously, this is likely attributed to our small sample size.
Again, as mentioned above, the relevance of comparing groups offering fundamentally different interventions does not allow isolating the effect of manual therapy.
Again, as mentioned in preceding paragraphs, precise quality control measures are essential to the conduct of a reliable trial and may be unique to each trial.
After incubation with the appropriate horseradish peroxidase-labeled secondary antibody, blots were again washed as mentioned before.
Reaction conditions were again the same as mentioned previously with the following changes: primer concentrations were increased to 0.6 μM, and 1 μL of the preceding product was used to seed the reaction which was run with the following conditions: 95°C for 6 minutes, 14 cycles of 94°C for 1 minute, 65°C for 1 minute (0.5°C per cycle), and 72°C for 1 minute.
They were barely mentioned again, as far as I remember.
That killing fell within the period under review here, but is not mentioned (again as far as I can see on first reading).
