function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chappuis, P. A.', 1],
    ['Dimante-Deimantovica, I. & Jensen, T. C. & Walseng, B.', 1],
    ['Dole-Olivier, Marie-José & Galassi, Diana M. P. & Fiers, Frank', 1],
    ['KARPOWICZ, Maciej', 2],
    ['Tang, Danny & Knott, Brenton', 1],
    ['Watiroyram, Santi & Brancelj, Anton & Sanoamuang, La-Orsri', 2],
    ['Watiroyram, Santi & Janpong, Wongduan & Sanoamuang, Laorsri', 2],
    ['Watiroyram, Santi & Koompoot, Kamonwan', 1],
    ['Watiroyram, Santi & Sanoamuang, La-Orsri & Brancelj, Anton', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=16)',
    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);