function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ailán-Choke, Lorena Gisela', 1],
    ['Garrido-Olvera, Lorena & García-Prieto, Luis', 9],
    ['González-Solís, David & Mariaux, Jean', 1],
    ['Lopes, Daniela A. & Gomes, Delir Correa & Knoff, Marcelo', 3],
    ['Moravec, František & Jirků, Miloslav', 1],
    ['Moravec, František & Justine, Jean-Lou & Rigby, Mark C.', 2],
    ['Moravec, František & Justine, Jean-Lou & Würtz, Jürgen', 1],
    ['Pinheiro, Raul Henrique da Silva', 1],
    ['Ramallo, Geraldine & Cancino, Fabiana & Ruiz, Ana Lía', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);