function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Daly, Marymegan & Gusmão, Luciana', 1],
    ['Fautin, D. G.', 3],
    ['Gerdes, Klaas & Kihara, Terue Cristina & Martinez Arbizu, Pedro', 2],
    ['Gusmão, Luciana C. & Rodríguez, Estefanía', 5],
    ['Hertwig, Richard', 1],
    ['Rodríguez, Estefanía & López-González, Pablo J.', 4],
    ['Schejter, L. & Genzano, G. & Pérez, C. D. & Acuña, F.', 1],
    ['Zelnio, Kevin Andrew & Rodríguez, Estefanía & Daly, Marymegan', 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);