function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abe, Hirokazu & Sato-Okoshi, Waka', 3],
    ['Bick, Andreas', 4],
    ['Bick, Andreas & Bastrop, Ralf', 4],
    ['Delgado-Blas, Victor Hugo & Salazar-Silva, Patricia', 2],
    ['Faulwetter, Sarah & Simboura, Nomiki & Katsiaras, Nikolaos', 2],
    ['Glasby, Christopher J. & Timm, Tarmo & Muir, Alexander I.', 1],
    ['Götting, Miriam', 2],
    ['Lee, Geon Hyeok & Meissner, Karin & Yoon, Seong Myeong', 1],
    ['Mikac, Barbara', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);