function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Fuente, Javier Isaac De La & Rosales-Rosales, Wendy', 1],
    ['Karunarathna, Samantha C. & Priyashantha, K Hasith', 1],
    ['Kočić, Anja & Vujić, Ante & Tot, Tamara', 2],
    ['MAZáNEK, Libor & VONIČKA, Pavel & PREISLER, JiřÍ', 3],
    ['Mutin, V. A.', 1],
    ['O’Hara, James E. & Cerretti, Pierfilippo & Pape, Thomas', 1],
    ['Popov, Grigory V. & Prokhorov, Alexey V.', 5],
    ['Prokhorov, A. V. & Popov, G. V. & Shparyk, V. Yu.', 2],
    ['Samin, Najmeh & Sakenin, Hamid', 1],
    ['Sforzi, Alessandra & Sommaggio, Daniele', 1],
    ['de la Fuente, Javier Isaac & García-Jiménez, Jesús', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);