function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Carrenho, Renan & Rodrigues, Higor D. D.', 1],
    ['Castro-Huertas, Valentina & Minghetti, Eugenia', 1],
    ['Coscarón, María Del Carmen', 1],
    ['Distant, William Lucas', 1],
    ['Drake, Carl J.', 1],
    ['Guilbert, Eric', 1],
    ['Guilbert, Éric & Montemayor, Sara I.', 1],
    ['Heiss, Ernst & Eckelt, Andreas & Lederwasch, Manfred', 2],
    ['Krüger, Andreas & Deckert, Jürgen', 1],
    ['María C. Melo & Gimena Dellapé & Leonela Olivera', 3],
    ['Montemayor, Sara & Coscarón, María Del Carmen', 11],
    ['Stål, Carolus', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=25)',
    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);