scinote-web/app/views/protocols/index/_users_list.html.erb

<% protocol.user_assignments[0..3].each_with_index do |user_assigment, i| %>
  <span class="global-avatar-container" style="z-index: <%= 5 - i %>">
    <%= image_tag(avatar_path(user_assigment.user, :icon_small), title: user_name_with_role(user_assigment)) %>
  </span>
<% end %>

<% more_users = protocol.user_assignments[4..-1].to_a %>
<% if more_users.any? %>
  <span class="more-users" title="<%= user_names_with_roles(more_users) %>">
     +<%= more_users.size %>
  </span>
<% end %>