function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Karunarathna, Samantha C. & Priyashantha, K Hasith', 1],
    ['Kment, Petr & Rédei, Dávid', 1],
    ['Li, Ying-Ming & Shivas, Roger G. & Li, Bao-Ju & Cai, Lei', 3],
    ['Piątek, Marcin & Lutz, Matthias & Sousa, Francisca M. P.', 2],
    ['Piątek, Marcin & Piątek, Jolanta & Yorou, Nourou S.', 1],
    ['Savchenko, Kyryll & Mahmood, Huda', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=9)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);