On kofam.ch, find clinical studies in Basel for 'Herz-Kreislauf- und Herzerkrankungen' that are currently recruiting. After applying these filters, state the number of studies found. Additionally, list the main categories of further filters available under 'Weitere Filter'.
Navigate to the 'Studiensuche' page on kofam.ch. Clear any existing search filters using 'Filter zurücksetzen'. Select 'Basel' from the 'Studienstandort' (Study Location) filter. Select 'Herz-Kreislauf- und Herzerkrankungen' (Cardiovascular and Heart Diseases) from the 'Krankheitskategorie' (Disease Category) filter. Select 'Rekrutierung läuft' (Recruitment ongoing) from the 'Rekrutierungsstatus' (Recruitment Status) filter. Identify the total number of search results displayed. Click on 'Weitere Filter' (Further Filters). List all the distinct main filter categories that appear under 'Weitere Filter'.
The 'Basel' location filter is applied. The 'Herz-Kreislauf- und Herzerkrankungen' disease category filter is applied. The 'Rekrutierung läuft' recruitment status filter is applied. State the exact number of search results found after applying all specified filters. List all the distinct main filter categories (e.g., 'Studienteilnehmende', 'Studien in folgenden angrenzenden Ländern hinzufügen', 'Datenquelle(n)') that are visible under the 'Weitere Filter' section.