function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ansi, Amin Al & Alkhalaf, Areej A. & Fadl, Hassan', 4],
    ['Gonzalez, Guillermo & Cotoras, Darko D. & Grez, Audrey A.', 1],
    ['Pang, Hong & Tang, Xue-Fei & Booth, Roger G.', 76],
    ['Pang, Hong & Tang, Xue-Fei & Ślipiński, Adam', 5],
    ['Poorani, J.', 34]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=120)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 5, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);