Small hack when emailing or following up with a large group of people for information

We often have the task of requesting/emailing or following up with a bunch of people for information. Some of us do it to confirm attendees for a meeting, some others do it to collect material for a bit of research etc. And often, tracking responses can be a pain especially since those who don’t have information are unlikely to reply.
The issue we often face is we don’t know if the people who haven’t replied have actually read the email. And this can tend to be a difficult position especially if these are your superiors as constant follow up is not really an option.
In such situations, a simple line like..
‘Those who have read this and have no ….. to add, I would appreciate it if you could just reply with a :). Thank you in advance!’
..tends to works well. And takes off some stress from our system as well! :)