Here's a tip for beginners to acquire targeted leads from LinkedIn for free.
Visit the website recruitin.net.
Set the desired filters, including position and location for your prospects, and then click the green button.
Receive a link like this one (for dentists in the USA) - http://www.google.com/search?q=+"Dentist" -intitle:"profiles" -inurl:"dir/+"+site:www.linkedin.com/in/+OR+site:www.linkedin.com/pub/
Paste that link into Google Search (Pro tip: Adjust Google search settings to display 100 results per page).
The LinkedIn profiles will appear in the search results, but without email addresses.
Now, insert "@gmail.com" before -intitle in the link, like this http://www.google.com/search?q=+"Dentist" "@gmail.com" -intitle:"profiles" -inurl:"dir/+"+site:www.linkedin.com/in/+OR+site:www.linkedin.com/pub/
Perform the search again.
Press Ctrl + A to select all the information.
Go to https://email-checker.net/email-extractor, paste the text, and extract emails from them.
You can also use @yahoo.com or @outlook.com to broaden your results.
Awesome share, OP!