function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ale-Rocha, Rosaly & Limeira-De-Oliveira, Francisco', 4],
    ['Kryvomaz, Tetiana & Michaud, Alain & Stephenson, Steven L.', 4],
    ['Kunttu, Panu & Varis, Elina & Kunttu, Sanna-Mari', 4],
    ['Moreno, G. & Castillo, A. & Thüs, H.', 18],
    ['Treviño-Zevallos, Italo & García-Cunchillos, Iván', 23],
    ['Treviño-Zevallos, Italo & García-Cunchillos, Iván & Lado, Carlos', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=55)',
    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);