function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ayres, W. O.', 1],
    ['Deichmann, E.', 2],
    ['Pawson, David L. & Pawson, Doris J. & King, Rachael A.', 1],
    ['Prata, Jessica & Christoffersen, Martin L.', 2],
    ['Prata, Jéssica & Manso, Cynthia Lara De Castro', 2],
    ['Solis-Marin, Francisco Alonso & Alvarado, Juan Jose', 3],
    ['Yamana, Yusuke & Kohtsuka, Hisanori', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=13)',
    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);