function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Balachandran, Chellapandian & Anbalagan, Sankarappan', 1],
    ['Bojková, Jindřiška & Soldán, Tomáš', 3],
    ['Boonsoong, Boonsatien & Sartori, Michel', 4],
    ['El Alami, Majida & Benlasri, Mokhtar & Sartori, Michel', 1],
    ['Roopa, S. Ramya & Selvakumar, C. & Subramanian, K. A.', 3],
    ['Shi, Weifang & Tong, Xiaoli', 2],
    ['Yam, Rita S. W.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=15)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);