function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Christoph Germann', 1],
    ['Guerrero, R. J. & Fernández, F.', 2],
    ['Guerrero, Roberto J.', 2],
    ['Guénard, Benoit & Mccaffrey, Katherine A. & Lucky, Andrea', 1],
    ['Ivanov, Kaloyan & Hightower, Liberty & Dash, Shawn T.', 1],
    ['Ulysséa, Mônica Antunes & Prado, Lívia Pires do', 1],
    ['Varela-Hernández, Fernando & Riquelme, Francisco', 2],
    ['Ward, P. S.', 6],
    ['Wild, A. L.', 6],
    ['Wild, Alexander L.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);