function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Baquero, Enrique & Moraza, Maria Lourdes & Jordana, Rafael', 2],
    ['Hänel, Christine & Heyne, Heloise', 1],
    ['Mąkol, Joanna & Sevsay, Sevgi', 3],
    ['Saboori, Alireza & Hajiqanbar, Hamidreza & Hakimitabar, Masoud', 4],
    ['Saboori, Alireza & Lazarboni, Hossein', 2],
    ['Semenchenko, Ksenia A.', 2],
    ['Smith, Ian M. & Cook, David R. & Gerecke, Reinhard', 1],
    ['Stekolnikov, Alexandr A. & González-Acuña, Daniel', 2],
    ['Tashakor, Samaneh & Hajiqanbar, Hamidreza & Saboori, Alireza', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=21)',
    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);