function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Alvarez, Fernando & Villalobos, José Luis', 2],
    ['Collins, Pablo A. & Giri, Federico & Williner, Verónica', 3],
    ['Felix Caetano França, Nielson & Magalhães, Célio', 4],
    ['Jacobucci, Giuliano Buzá & Bueno, Alessandra A. De P.', 3],
    ['Magalhães, Célio & Campos, Martha R. & Türkay, Michael', 1],
    ['Mantelatto, Fernando L. & Tamburus, Ana Francisca', 3],
    ['Ng, P. K. L. & Low, M. E. Y.', 1],
    ['Rodríguez, G. & López, B.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=18)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);