function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Barrio-Amorós, César L. & Brewer-Carías, Charles', 1],
    ['Castiglia, Riccardo & Annesi, Flavia & Bezerra, Alexandra M. R.', 2],
    ['Harvey, Michael B. & Aguayo, Rodrigo & Miralles, Aurélien', 1],
    ['Hedges, S. Blair & Conn, Caitlin E.', 9],
    ['Miralles, Aurélien & Barrio-Amorós, César L. & Rivas, Gilson', 1],
    ['Miralles, Aurélien & Chaparro, Juan Carlos & Harvey, Michael B.', 1],
    ['Miralles, Aurélien & Fuenmayor, Gilson Rivas', 3],
    ['Miralles, Aurélien & Fuenmayor, Gilson Rivas & Bonillo, Céline', 2],
    ['Miralles, Aurélien & Rivas, Gilson & Schargel, Walter E.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=21)',
    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);