function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Angulo, Arturo', 1],
    ['Batista-Silva, Valéria Flávia & Frota, Augusto', 1],
    ['Carlos Donascimiento & John G. Lundberg', 1],
    ['Castro, Íthalo Da Silva & Wosiacki, Wolmar Benjamin', 1],
    ['Eigenmann, C. H. & Norris, A. A.', 1],
    ['Haseman, J. D.', 1],
    ['Ortega-Lara, Armando & Milani, Nadia & DoNascimiento, Carlos', 3],
    ['Ota, Renata Rúbia & Deprá, Gabriel de Carvalho', 4],
    ['Schubart, O.', 1],
    ['Silva, Gabriel S. C. & Reia, Lais & Morimoto, César K.', 2],
    ['Smith, Welber Senteio & Halcsik, Leticia', 1],
    ['Steindachner, F.', 2],
    ['de Brito, Victor & Buckup, Paulo Andreas', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);