function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Amon, Diva J & Ziegler, Amanda F & Kremenetskaia, Antonina', 2],
    ['Despalatović, Marija & Cvitković, Ivan & Žuljević, Ante', 1],
    ['Gebruk, Andrey V. & Solis-Marin, Francisco A.', 16],
    ['Madeira, Patrícia & Kroh, Andreas & Cordeiro, Ricardo', 7],
    ['Samyn, Yves & Vandenspiegel, Didier', 4],
    ['Thandar, Ahmed S. & Rambaran, Ryan', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=31)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);