function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Fautin, D. G.', 1],
    ['Grajales, Alejandro & Rodríguez, Estefanía', 2],
    ['Hertwig, Richard', 1],
    ['Mead, A. & Carlton, J. T. & Griffiths, C. L. & Rius, M.', 1],
    ['Tasso, Vicente & El Haddad, Mustapha & Assadi, Carolina', 1],
    ['Zelnio, Kevin Andrew & Rodríguez, Estefanía & Daly, Marymegan', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=7)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);