function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Appolloni, Massimo & Smriglio, Carlo & Amati, Bruno', 1],
    ['Cavallari, Daniel C. & Dornellas, Ana Paula S.', 3],
    ['Herbert, David G.', 1],
    ['Meyer, Otto', 3],
    ['Oliver, J. D. & Rolán, E.', 2],
    ['Pacaud, Jean-Michel', 1],
    ['Perugia, Ivan', 1],
    ['Poppe, Guido & Tagaro, Sheila & Goto, Yoshihiro', 1],
    ['Rolán, E. & Rubio, F.', 1],
    ['Rubio, F. & Rolán, E.', 42],
    ['Rubio, Federico & Rolán, Emilio', 24],
    ['Simone, Luiz Ricardo L.', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=83)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);