function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Eusébio, Rita & Sendra, Alberto & Enghoff, Henrik', 3],
    ['Graening, G. O. & Shcherbanyuk, Yana & Arghandiwal, Maryam', 18],
    ['Sendra, Alberto & Jiménez-Valverde, Alberto & Gilgado, José D.', 13],
    ['Sendra, Alberto & Nicolosi, Giuseppe & Amore, Elena', 1],
    ['Sendra, Alberto & Reboleira, Ana Sofia P. S.', 131],
    ['Sendra, Alberto & Sánchez-García, Alba & Selfa, Jesús', 1],
    ['Tillyard, Robin John', 1],
    ['Tusun, Sadreddin & Satar, Ali', 18],
    ['Tusun, Sadreddin & Özbay, Cengizhan', 12],
    ['Westwood, J. O.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=199)',
    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);