function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Barahona-Segovia, Rodrigo M. & Riera, Pamela', 1],
    ['Gilasian, Ebrahim & Vujić, Ante & Hauser, Martin', 2],
    ['Kočić, Anja & Vujić, Ante & Tot, Tamara', 1],
    ['Montoya, Augusto L.', 2],
    ['O’Hara, James E. & Cerretti, Pierfilippo & Pape, Thomas', 1],
    ['Prokhorov, A. V. & Popov, G. V. & Shparyk, V. Yu.', 1],
    ['Pétremand, Gaël & Speight, Martin C. D.', 1],
    ['Sforzi, Alessandra & Sommaggio, Daniele', 2],
    ['Steenis, Jeroen Van & Ricarte, Antonio & Vujić, Ante', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=16)',
    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);