function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Baturina, Maria A. & Kaygorodova, Irina A. & Loskutova, Olga A.', 5],
    ['Collado, Rut & Schmelz, Rüdiger M.', 1],
    ['Cui, Yongde & He, Xuebao & Peng, Yu & Wang, Hongzhu', 1],
    ['Ohtaka, Akifumi', 1],
    ['Schenková, Jana & Pařil, Petr & Petřivalská, Karla', 2],
    ['Schenková, Jana & Čermák, Václav', 1],
    ['Schmelz, Rüdiger M. & Jocque, Merlijn & Collado, Rut', 5],
    ['Šundić, Danijela & Radujković, Branko M.', 9]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=25)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);