function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Caspeta-Mandujano, Juan Manuel & Jiménez, Francisco Agustín', 1],
    ['Diouf, Malick & Quilichini, Yann & Granjon, Laurent', 1],
    ['Lopes, Daniela A. & Gomes, Delir Correa & Knoff, Marcelo', 2],
    ['Lunaschi, Lia I. & Álvarez, Victor Hugo Merlo', 1],
    ['Lux Hoppe, Estevam Guilherme & Araújo de Lima, Roberto César', 1],
    ['Lynggaard, Christina & García-Prieto, Luis', 1],
    ['Simões, Mariana Brandão & Moreira, Narcisa Imaculada Brant', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=10)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);