function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['David, Karamankodu Jacob & Hancock, David Lawrence', 10],
    ['El-Hawagry, Magdi S.', 3],
    ['El-Hawagry, Magdi S. & Abdel-Dayem, Mahmoud S.', 1],
    ['Han, Ho-Yeon & Ro, Kyung-Eui', 6],
    ['Harym, Younes El & Belqat, Boutaina', 2],
    ['Harym, Younes El & Korneyev, Valery', 1],
    ['Korneyev, S. V. & Hauser, M. & Borkent, C. & Maples, B. K.', 1],
    ['Kovac, D. & Kameneva, E. P. & Korneyev, V. A.', 4],
    ['Mazzon, Luca & Whitmore, Daniel & Cerretti, Pierfilippo', 1],
    ['Merz, B. & Kofler, A.', 7],
    ['Namin, S. Mohamadzade & Nozari, J.', 8],
    ['Namin, Saeed Mohamadzade & Korneyev, Valery A.', 6],
    ['O’Hara, James E. & Cerretti, Pierfilippo & Pape, Thomas', 1],
    ['Penado, Andreia & Smit, John & Aguiar, António Franquinho', 3],
    ['Schlüsslmayr, Gerhard', 1],
    ['Other (2)', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=57)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);