function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Balogh, János & Balogh, Péter', 1],
    ['Behan-Pelletier, Valerie M. & Lindo, Zoë', 1],
    ['Ermilov, Sergey G. & Liao, Jhih-Rong', 1],
    ['K, Heinrich Schatz', 3],
    ['Oliveira, Anibal R. & Argolo, Poliane S. & De, Gilberto J.', 2],
    ['Revelo-Tobar, Harol', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=11)',
    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);