function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Calder, Dale R.', 6],
    ['Estrada-González, Mariae C. & Agüero, José', 2],
    ['Galea, Horia R.', 2],
    ['Galea, Horia R. & Schuchert, Peter', 1],
    ['Gravili, Cinzia & Vito, Doris De & Camillo, Cristina Gioia Di', 1],
    ['Humara-Gil, Karla J. & Cruz-Gómez, Christopher', 1],
    ['Lamouroux, Jean Vincent Felix', 2],
    ['Mendoza-Becerril, María A. & Estrada-González, Mariae C.', 1],
    ['OLIVEIRA, OTTO M. P. & MIRANDA, THAÍS P. & ARAUJO, ENILMA M.', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    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);